NYC-WTC_000188662

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LA£ GROUP #: 16 Lab Sample No 6154 3 Filter Type MCE rniii Operacor Client Spl. Nc. NSH5-EIR-1C '17-11 er Area 3SS mm Instrument I.D. EM 10 CRT Grid I.D- f Disk No Screen Magnification 16,40QX (GO) Area 0.01124 mm~2 Comments Acc. Voicage &0 kV No. GO to be Analvzed 4 3.147 Struct. Corspd. to 70 s/mm^c.i

GO. structure Structure Type Length I.D. of Structure EDS >0.5 urn (Nonasb. No, Coord. No. F B C M Sum Chrys. Amphibole Nonasb. Ambig./ND Elements) < 5 um

L3

Store all unrepeated spectra^ Photo No. (from 1 in 5 asbestos— Identify all atructurea using EDS Check diffraction for aabestoa containing aamplea) Grid acceptance;! atructurea up to 70b Z^n (l>t 4) <50X undiaaolvea filter, overlapped or folded Struct, s > 0.5um A > 5:1 Aspect Ratio <10X particulate coverafe >S0X coveraje Totals Ns Not Observed (EDS spectrum or diffraction pattern) at leaat 20 unfolded or overlapped grid squares Positive diffraction pattern properties conforming <SX holes or opaque areas F B C M > Sum to laboratory identification criteria observed. Jnuaed portion Per ehryaeUle: O.Tanm SMeins for (080) reneetiena, or rutor Chrysotile O.SSnm spacing for the layer Tine repeat, streaking ■Avoided portion of (110) and (130) reflecUons. of niter For amphiboles: 0.&3nm layer line repeat, and approx. Portion of niter (Smm wide) 3.9 ratio of non-tvinnod layer line spot spacing to ■abject to Amphibole layer Uns repeat distanca (O.fi3nm). examination

EDS spectrum conforming to laboratory IdenUhcation criteria observed. AMPHIBOLES Ambiguous Fs Singia Fiber (1-3 Interaectloni s 1-3 flbera) Amosite B= Bundle (>□ fibera <1 fiber diameter apart) ZSmni niter Crocidolite Non—asbestos Cs Cluster (>3 interaectione) -------i'* Stopping Rulea; I------- Anthophyllite M= Matrix NSOs No Structure* Detected [ >90 i/B.O. or in let 4 C.O. Tremolite Actinolite Non-Identified L:\nATA\PRIVATT\MIlCEC\CADD\TEW3 8/22/98

CITY_21MC100_003082305

NYC-WTC_000188662